ListFragment继承了Fragment，顾名思义，ListFragment是一种特殊的Fragment，它包含了一个ListView，在ListView里面显示数据。

1. MainActivity

Java类文件：

package com.example.hzhi.fragmentdemo;

import android.app.Activity;
import android.os.Bundle;
import android.app.FragmentManager;
import android.app.FragmentTransaction;


public class MainActivity extends Activity {
    private FragmentManager manager;
    private FragmentTransaction transaction;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        manager = getFragmentManager();
        transaction = manager.beginTransaction();
        ListFragmentImpl frgImpl = new ListFragmentImpl();
        ListFragmentSelf frgSelf = new ListFragmentSelf();
        transaction.add(R.id.fragment1, frgImpl, "frgImpl");
        transaction.add(R.id.fragment2, frgSelf, "frgSelf");
        transaction.commit();
    }

}

xml布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <LinearLayout
        android:id="@+id/fragment1"
        android:layout_weight="1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"/>

    <LinearLayout
        android:id="@+id/fragment2"
        android:layout_weight="1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"/>

</LinearLayout>

可见MainActivity是比较简单的，在布局里面放了左右两个ListFragment。

2. ListFragment

2.1 左边的ListFragment

Java类文件：

package com.example.hzhi.fragmentdemo;

import android.app.ListFragment;
import android.widget.ListView;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.util.Log;
import android.widget.Toast;
import android.widget.SimpleAdapter;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;

public class ListFragmentImpl extends ListFragment{
    private static final String TAG = "ListFragmentImpl";

    private ListView selfList;

    String[] classes = {
            "计算机网络",
            "操作系统",
            "C语言",
            "Java",
            "数据库原理",
            "移动开发",
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Log.d(TAG, "onCreateView");
        return inflater.inflate(R.layout.list_fragment_impl, container, false);
    }


    @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, "onCreate");
        super.onCreate(savedInstanceState);
        // 设置ListFragment默认的ListView，即@id/android:list
        this.setListAdapter(new ArrayAdapter<String>(getActivity(),
                android.R.layout.simple_list_item_1, classes));